Brachmia custos is a moth in the family Gelechiidae. It was described by Edward Meyrick in 1911. It is found in southern India.[1]
The wingspan is about 19 mm. The forewings are dull ochreous brown with a basal fascia of rather dark fuscous suffusion and with the costa infuscated from this to beyond the middle. There is a broad fascia of rather dark fuscous suffusion beyond the middle, the second discal stigma forming a small round dark fuscous spot on the inner edge of this. The hindwings are grey.[2]